Projectile fuse



v L. E. RMONDY March 12, 1929.

' PRoJEcTILE: FUSE Filed Feb. 5. 1927 Patented Mar. 12, 1929.

UNlTED STATES 1,705,206.: PATENT' oFFIcE.

Ln'oN EMILE RMQNDY, or` PARIS, FRANCE.

PROJECTILE FUSE.

Application l'ed February 5, 1927, Serial No. 166,237, and in France May 6, 1926.

of the liring mechanism (percussion cap and striker), two compressible supports; it requires no safety member although its opera.- tion cannot take place in the bore of the gun barrel or in the event of a liall of the projectile from a small height; and nally, the

elements ot' the fuse (percussion cap, striker and compressible supports) are adapted to be placed in position directly in the lodgment provided for them in the fuse body.

The fuse according to the. invention is essentially characterized by the feature that the rear element of the firing mechanism (preferably the percussion cap orprimer) is placed between two elastic supports ot' different degree of compressibility, the rear elastic support, of greater compressibility, resting upon the base of the lodgment provided in the fuse body, while the front support ot smaller compressibility abuts at the trout end against the-complementary member l-of the mechanism (preferably the striker') which is prevented from escaping outwardly relative 'to 'the fuse 'body by a shoulder formed upon said fuse body, said complementary member being free to make an inward movement over a limited distance determined by another stop also formedv upon the fuse body.

The invention is capable of receivingv a variety of mechanical expressions, several of which are shown on the accompanying drawings, but it is to be expressly understood that the drawings are for purpose'sfof illustration only and are not to be construed as a deinition of the limits ot' the invention, reference being'had to the appended claims for that purpose. Referring in detail to the drawings, wherein like reference characters are employed to designatesimilar parts in the several views- Fig. 1 is an axial sectional view of an embodiment of thepresent invention; and

Figs. 2, 3, 4, 5 and 6 are similar views ot other embodiments ot' the invention.

In the'form shown in Fig. l.

lThe elastic supports of different degrees of compressibility are formed by springs. In this figure. A is a fuse lbody in which a lodgment A1 is provided for the whole ot` the tiring mechanism, which lodgnent com- D, of smaller compressibility than C 'bears at'its front end against the head Kl of the striker E. The. latter isv `prevented from making any outward vmovement by a shoulder al formed upon the fuse body, ,forex-fy ample, by'turning in the-outer lip or edge ot' the latter.

The striker is adapted to make an' inward movement 'over a small distance,afte`r which it abuts against asho'ulder'az' also formed upon the fuse body A. 'The diference in compressibility between the twosprings C and D ma be obtained by a dierence in section yo kind andthe springv C made longer than theV l springi'D.

When an obstacle is struck, even a very light one, such as the wing fabric'of an aeroplane, for example, the fuse operates instantaneously. In fact, .the striker K, which'v may be lvery light, is driven intothe fuse body until it abuts against the shoulder a2 and this movementtakes place while the fuse body' A and the projectile,'penetrating into the very light obstacle or pushing the latter back, cont-inuetheir forward'V movement at the only slightly reduced speed of the 'projectil'eat that moment. The per'- 'cussion'cap B the kinetic venergy l/2 m 172 of which is very high on-'account of the very A' high value-of the factor 172 j (where V is the residual speed of 'the projectile), compresses the spring D and strikes the point of the striker K.

On the other hand, in the eve-nt of a fall of the projectile from a small height, even on to a hard body the striker isdriven back as far as the shoulder a2 but cannot reach the percussion cap B which is itself driven back a corresponding distance by the spring er elastic support D. The latter offers a greater resistance than the spring or support the material composing the sprlngs; the springs may also be of the same .In the example described C and since the kinetic energy of the percussion capis, these: conditions veryv small, -Y sadf'cap cannot materially l assist f inf compressing the spring or support D... When a projectile fitted. with. the, ,furs e. o f

the present invention is firedlfrom'a gun, tlieA force oi' set-back is ineective to produce impact between the striker and percussion cap, since spring, C is more readily compres--A sible than spring D, and preferably the mass of the percussioucap, isgreater than the mass of the striker K. Set-back therefore increases the distance between the'- percussion-capand striker-.

having dilerent degrees. .of compressibility may .naturally be considerably varied lin shape. They may be replacedby Belleville ringsor by elastic vbellows made of metal,

metal and .leather or any other suitable-belf- In the fofmfsiim innig; 2'. Aci@ ,ensue supports haying (litter-ent degrees:y fot. compnessihility, 'between which thel percussion cap. is; placed, are; formed-:by sleeves made of. a plastic. materialI such; ascork, for example, v

orielt;

obtained by a simple dierence in height, of

the compressible members; Thasleeve 'D1 whichlforms'the, upper fcompressible support :be so constructedthat the .axial 4duct passing throughiservesas .a guide .for the pin E .ofthestriker- Ez---Elf The elements-of the fuse, ginsteadfof disposed entirely 'and directly; in a lOdg-v.V ment provided 'in theffusebody. .es

completelyor partly/lodged in a socketor gaine F, at the bottom of which socket is.

I shownin 3, be disposed ina socket or. gaine .HE Which'is a..V simple. Asleeve -itgin theI lodgmentl provided for. it Ain the, {use .body A.v4

The lower. art of this socket. mayconstitute a support. or the detonating percussion-capii Gn., Strips 'HE may becut in the Wall of the 1 socket Hxand turned inwardsy sof as to formf stops preventing any forward movement .of

the percussion; capk B.. ShOWD. in. Figure 4. the. socket. or sleeve t containing the whole of the fuse and. detonating percussion cap may be .formed by the fuse body itsellC which will be suitably shaped for this purpose. A y j Figure v5 showsl au embodiment .of the I in? the Whole of the mechanismi (E-Be-Cl-Dl) and the detonating percussioitecap. (G1) is providediwith: screw threads lz, for screwing' the fuse intothe projectile.

Figure 6 shows an embodiment of the in-A above the springs.

tliauthe first Inentioaiedl support.

vention in which the elast-ic supports are, as in the "embodiments shown Ainglgures 2 to 5, v'-iz'ormed by; sleeves made-cfa :plastic material. In. this case any forward movement of the, percussion cap B is prevented by the end facie-V otaV` sleeve which itselfl held in Vplace by its flange or collar z' which is gripped between one oi' the elements A of the fuse bodyanda fron-t removable element AX screwed-upon A, upon which element AX are formed the. abutment shoulders-0L1 which prevent the;outward movement. of the striker.,A v v Naturally, lthe-.principle o' construction according to which the Whole. of thering mechanism and detonating percussion capA is located inaconnnon'sleeve or socket-Which :may be foi-medi by the fuse body itself is ada-ptedfor. whatever be the mode. oji-v construction oitl'ie'percussion mechanism- Thestriker may comprise a2 portion otre,-

duced diameter which inthe case of= aiguille'A or anglelimpact WilLpermit the headE1:ot

the point: E rom; its orig-mal-idirectienif formed, l declare.A vthat yWhat .I claim! siff' 1.. A i Vfuse comprising a fusebody having formed'thereiua gaine,.primerand striker `elements .posltioned in said .gaine,.an-

tic support vintermediate ,said elements, .and

'an elastic5..Supportintermediate=-the nears..

Wardly positioned I'one of g said, elements and;

the; bottomwo, said ga inethe` last mentioned.l

one* .of (said .support- S v being moreV yielding .2. A de .'ce comprising a fusebody,hav'-V ingl a recess formed .there`m primer andand'. a. yiel d ing .support positioned intermediatethe-use body. and .the.reanwardly.

mounted'one of said elementsf said. second named yieldingsupport being more: readily. yieldable .thanl the first named .yieldingsupl' port;r -f

3,111 a .de vice, a fuse body-havingarev cess therein primer and striker i elementsf po- 1 sitioned in alignment in saidrecess, a yield@ ing support.1nter1nedxate saidfprimer and striker elements, and a.. yielding. member.`

having direct engagement with; said `primer and said fuse body, said primer and striker being relatively and longitudinally slidable at all times insaid-recess.V vention 1n which the sleeve Hfl containing.

4. In a deviceofthe class described, a fuse -body .having a. recess; therein, a sleeve fixedly positionedwinrsaid recess, primer and strikerf elements slidably mountedin said sleeve, yielding means-only for resisting relative movement between the .p'rimer, striker the striker, to'be deformed; without deflect-ing;v

9(12 L Havinv'now particularly: described fand. asf

5. the I nature. of my: ,sa-id invention andmavhat manner. thesame is tobeperand fuse body, one portion of said means being more yielding than another portion thereof, and a detonating percussion cap carried by said sleeve.

5. In a device of the class described, a fuse body, a striker having an enlarged head slidably mounted within the fuse body adjacent the forward end thereof, a primer slidably mounted in said fuse body in alinement with said striker, yielding means operatively engaging said primer and striker, and yielding means of greater compressibility than said first named yielding means interposed between said primer and fuse body.

6. In a device of the class described, a fuse body, primer and striker elements slidably mounted in alinement, in said body, said body being provided with means tor positively limiting movement of one of said elements, and yielding means engaging the opposite faces of the other of said elements to resist engagement of said elements.

7. In a device of the class described, a fuse body, primer and striker elements slidably mounted, in alinement, in said fuse body, and tubular yielding members interposed between said elements and between one of said elements and the fuse body, the

last named tubular member being more yielding than the tubular member interposed between said elements.

8. In a device of the class described, a fuse body having a recess therein, primer and striker elements slidably mounted, in alinement, in said recess, a tubular yielding member interposed between said primer and striker, and a tubular yielding member inter osed between said primer and said fuse bo y, the last named tubular member being more yieldable than the first named tubular member.

9. In adevice of the class described, a fuse body having a recess formed therein and a shoulder provided adjacent one end of said recess, a striker slidably mounted in said recess and normally having engagement with said shoulder, a primer slidably mounted in said recess, yielding means interposed between said primer and striker, and yielding means interposed between the striker and fuse body, said last named means being more yieldable than the first named yielding means.

In testimony whereof I have signed this specification.

LEON EMILE REMONDY. 

